TABLE 2.
Treatment‐related variables
| No AL | AL | 95% CI | Total | P | ||
|---|---|---|---|---|---|---|
| No. procedures/year | <10 | 18 (78.3) | 5 (21.7) | 7.5–43.7 | 23 (100) | 0.296 |
| 10–19 | 397 (89.0) | 49 (11.0) | 8.6–11 | 446 (100) | ||
| 20–29 | 543 (89.8) | 62 (10.2) | 10.3–13.5 | 605 (100) | ||
| 30+ | 3888 (89.9) | 436 (10.1) | 7.8–10.9 | 4324 (100) | ||
| Emergency surgery | No | 4630 (89.8) | 526 (10.2) | 8.2–14.3 | 5156 (100) | 0.734 |
| Yes | 82 (88.2) | 11 (11.8) | 8–12.9 | 93 (100) | ||
| (Missing) | 134 (89.9) | 15 (10.1) | 149 (100) | |||
| Number of cartridges | 1 | 1651 (92.0) | 143 (8.0) | 9.4–11.1 | 1794 (100) | <0.001 |
| >1 | 1108 (87.7) | 155 (12.3) | 6.1–20.2 | 1263 (100) | ||
| (Missing) | 2087 (89.1) | 254 (10.9) | 2341 (100) | |||
| Type of approach | Open surgery | 2222 (91.1) | 218 (8.9) | 6.8–9.3 | 2440 (100) | 0.003 |
| MIS not converted | 2232 (88.9) | 280 (11.1) | 10.5–14.2 | 2512 (100) | ||
| MIS converted | 191 (85.3) | 33 (14.7) | 9.6–12.2 | 224 (100) | ||
| (Missing) | 201 (90.5) | 21 (9.5) | 222 (100) | |||
| Type of procedure | Down to up | 4660 (89.8) | 530 (10.2) | 9.9–12.4 | 5190 (100) | 0.883 |
| Up to down | 182 (89.2) | 22 (10.8) | 10.4–20.1 | 204 (100) | ||
| (Missing) | 4 (100.0) | 0 (0.0) | 4 (100) | |||
| Splenic flexure mobilization | No | 955 (91.2) | 92 (8.8) | 6.9–15.9 | 1047 (100) | 0.273 |
| Yes | 3482 (90.0) | 386 (10.0) | 9.4–11.1 | 3868 (100) | ||
| (Missing) | 409 (84.7) | 74 (15.3) | 483 (100) | |||
| Site of vascular ligation | High tie | 3922 (90.2) | 424 (9.8) | 7.1–10.7 | 4346 (100) | 0.454 |
| Low tie | 605 (91.3) | 58 (8.7) | 9.1–11 | 663 (100) | ||
| (Missing) | 319 (82.0) | 70 (18.0) | 389 (100) | |||
| Type of anastomosis | End to end | 4260 (89.5) | 501 (10.5) | 8.9–10.7 | 4761 (100) | 0.101 |
| Side to end | 554 (91.7) | 50 (8.3) | 6.7–11.2 | 604 (100) | ||
| (Missing) | 32 (97.0) | 1 (3.0) | 33 (100) | |||
| Type of anastomosis | Mechanical | 4670 (89.8) | 529 (10.2) | 9.7–11.4 | 5199 (100) | 0.526 |
| Manual | 163 (88.1) | 22 (11.9) | 6.2–10.8 | 185 (100) | ||
| (Missing) | 13 (92.9) | 1 (7.1) | 14 (100) | |||
| Protective ‐ostomy | No | 2219 (89.3) | 267 (10.7) | 9.4–11 | 2486 (100) | 0.066 |
| Ileostomy | 1976 (90.6) | 206 (9.4) | 7.6–17.5 | 2182 (100) | ||
| Colostomy | 400 (87.1) | 59 (12.9) | 0.2–33.9 | 459 (100) | ||
| (Missing) | 251 (92.6) | 20 (7.4) | 271 (100) | |||
| Combined multiorgan resection | No | 3767 (90.8) | 380 (9.2) | 8.3–10.8 | 4147 (100) | 0.004 |
| Yes | 788 (87.7) | 111 (12.3) | 9.9–16.3 | 899 (100) | ||
| (Missing) | 291 (82.7) | 61 (17.3) | 352 (100) | |||
| Operative time (h) | <3 h 00 | 992 (92.3) | 83 (7.7) | 6.2–9.5 | 1075 (100) | <0.001 |
| 3 h 00–4 h 59 | 2252 (89.8) | 255 (10.2) | 9.0–11.4 | 2507 (100) | ||
| 5 h 00+ | 1052 (85.5) | 178 (14.5) | 12.6–16.6 | 1230 (100) | ||
| (Missing) | 550 (93.9) | 36 (6.1) | 586 (100) | |||
| Pelvic drain | No | 71 (91.0) | 7 (9.0) | 7.4–10 | 78 (100) | 0.978 |
| Yes | 4486 (90.3) | 483 (9.7) | 10.9–13.3 | 4969 (100) | ||
| (Missing) | 289 (82.3) | 62 (17.7) | 351 (100) |
Bold indicated significance value (P < 0.05).
Abbreviations: AL, anastomotic leak; MIS, minimally invasive surgery.